Answer:
Yes, she did. She was 34 and then she was awarded a prize 4 this wonderful accomplishment.
The previous answer is not accurate. Madam Walker was still working as a washerwoman when she was when she was 34 years old. She started selling hair care products around 1904 when she was 37 years old and founded her own company in 1906. She purchased hot combs manufactured by other vendors and did not make hot combs. She also did not invent them.
Source: On Her Own Ground: The Life and Times of Madam C. J. Walker by A'Lelia Bundles